Two AI email tools for Microsoft 365. One is generic and built into the suite. The other is a focused email add on. Here is the honest comparison plus a third option that may suit you better.
Microsoft Copilot is Microsoft's first party AI, woven through Word, Excel, PowerPoint, Teams and Outlook. It is genuinely strong at cross application work like turning a meeting into a deck, summarising a long document, or asking a question across your files. The trade off is that the email experience is generic. Copilot drafts in a polished professional voice, but rarely sounds like you.
Fyxer Pro is more focused. It connects to Outlook through the Microsoft Graph API and adds AI auto categorisation and drafting on top of your existing inbox. It learns from your sent email patterns and drafts replies in something closer to your voice. It does not span the rest of the M365 suite the way Copilot does.
Pricing is roughly £25 per user per month for Copilot and £40 per user per month for Fyxer Pro, both on top of an existing Microsoft 365 subscription. The right pick depends on whether you want one assistant for the whole suite or a tool focused on email drafting. There is also a third option worth knowing about.
SMART Reply is a Microsoft certified Outlook add in. It lives inside Outlook the way Copilot does, but trains on your business the way neither Copilot nor Fyxer do. Your last 400 emails, your website, your documents and your customers' websites build a private knowledge base that drafts every email, LinkedIn post and meeting follow up in your voice. Plus travel planning, booking pages, meeting intelligence and one click filing to OneDrive and SharePoint. £35 per user per month with a 14 day free trial.
Try SMART Reply free for 14 daysSMART Reply only reads the mailbox of the user who installed it. Nothing crosses SharePoint or OneDrive permission boundaries. Copilot inherits the user's full Graph permissions and has surfaced documents that should have stayed private.
Fyxer learns from your sent emails. Copilot drafts in a generic voice. SMART Reply learns from your last 400 emails, your website, your documents and your customers' websites. The drafts sound like you and know your business.
LinkedIn posts and comments, travel planning with diary blocking, branded booking pages, meeting intelligence with one click follow up, and filing to OneDrive and SharePoint with learned folder rules. All in the same price.
Microsoft Copilot is built into the Microsoft 365 suite and works across Word, Excel, PowerPoint, Teams and Outlook with one generic AI. Fyxer focuses only on email, connecting to Outlook through the Microsoft Graph API and learning your sent email patterns to draft replies in your voice. Copilot is broader. Fyxer is more focused. Neither lives inside Outlook the way a Microsoft certified add in does.
Fyxer Pro is around £40 per user per month. Microsoft Copilot is around £25 per user per month. Both require an existing Microsoft 365 subscription. Fyxer Pro is more expensive but more focused on email drafting and inbox automation. Copilot is cheaper but generic across the whole M365 suite.
Microsoft Copilot drafts emails in a generic professional voice. It can take instructions about tone but it does not learn from your past email patterns to match your individual writing style. Fyxer is closer to a voice match because it trains on your sent email behaviour. Neither tool learns from your website, your documents or your customers' sites.
Yes. Microsoft Copilot inherits the full Microsoft Graph permissions of the user. There have been documented incidents of Copilot surfacing payroll, HR or strategy documents that the user had stale or over broad SharePoint access to. This is the cross permission data exposure risk that enterprise IT teams now ask about. Fyxer reads only the user's mailbox, not their wider SharePoint or OneDrive.
Yes. SMART Reply is a Microsoft certified Outlook add in that lives inside the Outlook UI. It learns from your last 400 emails, your website, your documents and your customers' websites, and covers LinkedIn posts and comments, travel planning, branded booking pages, meeting intelligence and one click filing to OneDrive and SharePoint. £35 per user per month with a 14 day free trial.
14 days free. No credit card. Cancel anytime. Microsoft certified, lives inside Outlook, trained on your business.
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